Operating Instruction Manual TOA POWERED MIXER Model MX-104 TOA ELECTRIC CO., LTD.
Contents General Description 2 Features 2 Front Panel [Names of components & their usage] 3 Rear Panel [Names of components & their usage] 4 Connection Examples 5 Input Connections 6 Block and Level Diagrams 7 Specifications 8 Characteristics Diagrams 9 Appearance 9 Precautions 1. XLR Type Audio Connector The connectors are wired as follows. The pin 1 is ground [shield), the pin 2 cold (low, minus), the pin 3 hot (high, plus). 2. Description of components and functions on the MX-104.
General Description The TOA MX-104 is a very compact, four channel self-powered mixer. It was designed to deliver maximum features and performance in a cost-effective portable PA package. The MX-104 features four input channels, one program output, and one Foldback output. The internal amplifier is rated at 100 watts into an 8 ohm load, and 150 watts into 4 ohms. Each input channel has an electronically balanced XLR connector, and a highimpedance unbalanced 1/4" phone jack.
Front Panel High Equalizer Control (HIGH) The high EQ control alters the high frequency response of the input channel, providing ±13dB at 10kHz, and ±15dB at 20kHz of continuously variable active shelving equalization. The "0" detented position provides flat audio response. Low Equalizer Control (LOW) The low EQ control provides ±13dB at 100Hz and ±15dB at 50Hz of continuously variable active shelving equalization. The "0" detented position provides flat audio response.
Rear Panel Power Switch (POWER) The power switch is a threeposition type with the middle position being the "off position. The MX-104 should be operated in the switch position which produces the lowest amount of system hum. Cord Wrap The cord wrap is provided for convenient storage of the power cord when the MX-104 is not in use. Caution - The power cord should always be completely removed from the cord wrap prior to operation of the unit. This will insure maximum cooling of the MX-104.
Connection Examples SPEAKER SYSTEM for foldback MAIN SPEAKER SYSTEM (Self powered speakers TOA model SM-25A) From Speaker jack on Rear Panel KEYBOARD Low Z input should be connected with low impedance (50 ohm ~ 600 ohm) microphones CASSETTE TAPE DECK for playback MUSICAL INSTRUMENT — 5 —
Input Connections Generally speaking, there are two rules to follow when connecting equipment outputs to the inputs of other equipment. 1. Properly match the impedances of the outputs and inputs. 2. Connect low impedance outputs to high impedance inputs. It goes without saying that not only input and output impedance matching, but also level matching should be taken into consideration.
Block and Level Diagrams BLOCK DIAGRAMS LEVEL DIAGRAM —7—
Specifications MIXER SECTION Maximum Voltage Gain INPUT to PGM out INPUT to FB out INPUT to GEQ out AUX to PGM out Frequency Response +0, -3dB 60Hz~20kHz (input LEVEL at "5" position) Total Harmonic Distortion 0.05% +4dB* at 1kHz.
Characteristics Diagrams LOW Z HIGH Z IN & INPUT EQ (LEVEL Control) HIGH Z IN. & INPUT EQ (se t at "5") GEQ POWER AMP POWER BAND WIDTH POWER AM P T.H.D.
TOA ELECTRIC CO., LTD.
